Bob Holmström, Editor, 2934 NW 53rd Drive, Portland, OR 97210 Phone: 503-292-3685, <holmstro@europa.com>

Bill Givens, Sec. &: Publisher, 3850 Ashford Dr., Eugene, OR 97405 Phone (H): 541-465-9311 <Lbanks@ix.netcom.com>

Everett Jones, Treas., Phone: 440-729-4811

Ernie Martt, Founding Editor, Phone: 440-247-6712, Phone: 440-247-6712 <emartt@oh.verio.com>

Page Contents

1 Index of this issue.

2 - 6 A Short History of Pendulum Temperature Compensation by Robert Matthys

7 - 8 The Bumpy Road to Temperature Compensation by Robert Matthys

9 - 11 Measuring a Clock's Temperature Response by Robert L. Belleville

12 - 15 Design Considerations for Minimizing the Effects of Temperature Variation on the Period of a Pendulum by Dr. George Feinstein

16 - 18 Measuring Temperature Compensation with MicroSet by Bryan Mumford

19 - 20 Does it matter where you support the bob? by Bob Holmström

21 Humility by Alan Heldman

22 - 24 Thermal Compensation of Pendulum Clocks - A Reference List by Bob Holmström

25 Rock the boat Ned/Alan NAWCC National in Philadelphia.

The Horological Science chapter will meet on Thursday night, July 6 at 9:00 p.m. The topic will be current horological projects by members. It will be preceded by the Antiquarian Horological Society chapter meeting at 7:00 p.m. Will Andrewes will speak on "A day in 400 years"--- the origins and evolution of our calendar and other units of time. Will is well known as a past curator of the Time Museum and of the Collection of Historical Scientific instruments at Harvard, and the Chairman of the NAWCC Longitude Symposium at Harvard.

There is a Rock the Boat item and response in this issue. These are meant to be comments no longer than half a page on horological topics, including controversial ones, but not personal. This is a quick way to write a short article, convey an important idea or ask a question.

Request for articles: New material is always needed and appreciated. Are you, or someone you know working on something that would interest our readership? Please contact me if you need help getting your ideas and work into print.

Bob Holmström

Above: Drawing from Apians cosmographicus Liber of 1533, showing how a nocturnal is used to tell the time at night from the Great Bear.

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